Hi Rob Thank you for your reply.
It helps that the cause of the problem might be more clear, but I'm not sure how to proceed.
I forgot to mention that CFX launcher worked fine and it seems to be a Fluent-related problem. I've uninstalled everything and installed Fluent and SpaceClaim only, but the problem persists.
If I take a look at the target destination of the Fluent shortcut, the target is ""C:\Program Files\ANSYS Inc\v211\fluent\ntbin\win64\fluent.exe" -r21.1.0 -shortcut". If I remove "-shortcut" or " -r21.1.0 -shortcut" from that target destination, it launches fluent in local parallel mode.